A vehicle heater status detection method and related device

Abstract

The present application discloses a vehicle heater status detection method and related devices. In the process of driving the vehicle's heater with a target voltage to perform intake air heating, the actual current value of the heater is determined, and the actual current value is used to represent the actual current when the heater is working in the current state. Next, the current interval corresponding to the heater is obtained, and the current interval is used to identify the current value range allowed when the heater in a normal state is driven by the target voltage to perform intake air heating. Since the current interval is determined under the target voltage drive, and the target voltage is also driven in actual work, if the actual current value exceeds the current interval, it can be determined that the heater is in an abnormal state. Based on this, due to the adhesion, damage, etc. of the heater, the current of the heater will change when it is working. A method for detecting the heater status based on current is provided, so that abnormal conditions can be determined in time for timely maintenance.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle heater status detection method and related devices. Background Art

[0002] The engine of a vehicle is used to provide the driving force required by the vehicle. In actual applications, in order to improve the combustion performance of the engine, etc., the gas entering the engine cylinder will be heated. For example, when the engine is started, the intake temperature is increased by heating, thereby improving the combustion efficiency of the fuel.

[0003] In practical applications, the engine intake air can be heated by installing a heater, which is usually composed of a grille. In an engine system that adopts the exhaust gas recirculation (EGR) technology route, part of the exhaust gas discharged by the engine enters the intake pipe through the EGR valve, re-enters the engine to participate in combustion, and realizes the reuse of exhaust gas. However, the exhaust contains a lot of particulate matter, which will cause the particulate matter in the exhaust to adhere to the heater (such as the grille of the heater), thereby generating a lot of carbon deposits. When the amount of carbon deposits gradually accumulates to a certain extent, it will cause the heater to adhere (in severe cases, it may cause a short circuit). If it is not cleaned in time, it will affect the engine intake. Usually, when the heater is heated, the carbon deposits attached to the surface of the heater will also be burned off, thereby achieving the purpose of cleaning. However, for some vehicles (such as vehicles that have been driving in low-latitude areas for a long time), the heater may not be used for a long time. In this case, the accumulation of carbon deposits will be more serious. If the vehicle needs to use a heater at this time, due to severe adhesion, the heater may burn out during heating, and combustion debris and foreign matter may enter the engine cylinder, causing serious failures.

[0004] It can be seen that how to detect the status of the heater in order to discover related problems in time is of great significance for ensuring driving safety. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a vehicle heater status detection method which quickly detects the heater status based on a comparison between the actual current value and the current value range allowed during normal operation, so as to promptly determine the existence of abnormal situations, which is beneficial to improving driving safety, etc.

[0006] The embodiments of the present application disclose the following technical solutions:

[0007] On the one hand, an embodiment of the present application provides a method for detecting a heater state of a vehicle, the method comprising:

[0008] determining an actual value of a current of a heater for heating gas entering an engine cylinder of the vehicle during a process of driving the heater of the vehicle at a target voltage to perform intake air heating;

[0009] acquiring a current interval corresponding to the heater, the current interval being used to identify a current value range allowed when the heater in a normal state is driven by the target voltage to perform intake air heating;

[0010] If the actual current value exceeds the current interval, it is determined that the heater is in an abnormal state.

[0011] On the other hand, an embodiment of the present application provides a heater status detection device for a vehicle, the device comprising a determination unit and an acquisition unit:

[0012] The determination unit is used to determine an actual value of the current of a heater for heating gas entering an engine cylinder of the vehicle during a process of driving the heater of the vehicle at a target voltage to perform intake air heating, the heater being used to heat gas entering an engine cylinder of the vehicle;

[0013] The acquisition unit is used to acquire a current interval corresponding to the heater, wherein the current interval is used to identify a current value range allowed when the heater in a normal state is driven by the target voltage to perform intake air heating;

[0014] The determining unit is further configured to determine that the heater is in an abnormal state if the actual current value exceeds the current interval.

[0015] In another aspect, an embodiment of the present application provides a computer device, the computer device comprising a processor and a memory:

[0016] The memory is used to store program codes and transmit the program codes to the processor;

[0017] The processor is used to execute the vehicle heater status detection method described above according to the instructions in the program code.

[0018] On the other hand, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and the computer program is used to execute the vehicle heater status detection method described in the above aspects.

[0019] It can be seen from the above technical solution that in the process of driving the vehicle's heater to perform intake air heating with the target voltage, the actual current value of the heater can be determined first. The heater is used to heat the gas entering the engine cylinder of the vehicle, and the actual current value is used to indicate the actual current of the heater when it is working in the current state. Then, the current interval corresponding to the heater can be obtained, and the current interval is used to identify the current value range allowed when the heater in the normal state is driven by the target voltage to perform intake air heating. Since the current interval is determined under the target voltage drive, and the target voltage is also driven in actual work, if the actual current value exceeds the current interval, it can be indicated that the current state of the heater is different from the normal state. Specifically, it can be because the current exceeds the allowed current range due to adhesion, damage, etc. of the heater, so it can be determined that the heater is in an abnormal state for subsequent maintenance, etc. Based on this, with the help of adhesion, damage, etc. of the heater, the current of the heater will change when it is working, and a method based on comparing the actual current value with the current value range allowed during normal operation is provided to quickly detect the heater state, so that abnormal conditions can be determined in time, which is conducive to improving driving safety, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A flow chart of a vehicle heater status detection method provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of an intake air heating execution logic provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a controller hardware circuit provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of an abnormal state detection logic of an air intake heater provided in an embodiment of the present application;

[0025] Figure 5 A structural diagram of a vehicle heater status detection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The vehicle heater status detection method provided in the embodiment of the present application can be implemented by a computer device, which can be a terminal device or a server, wherein the server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. Terminal devices include but are not limited to mobile phones, computers, intelligent voice interaction devices, smart home appliances, vehicle-mounted terminals, etc. The terminal device and the server can be directly or indirectly connected via wired or wireless communication, and this application does not impose any restrictions on this.

[0028] The specific examples are as follows:

[0029] Figure 1 This is a flow chart of a vehicle heater status detection method provided in an embodiment of the present application, which is described by taking a terminal device as the aforementioned computer device as an example. The method includes S101-S103:

[0030] S101: In a process of driving a heater of a vehicle at a target voltage to perform intake air heating, an actual value of the current of the heater is determined.

[0031] The heater is used to heat the gas entering the engine cylinder of the vehicle. For example, when the vehicle is traveling in high-latitude areas and the ambient temperature is low (such as below -5 degrees Celsius), the heater is needed to heat the gas entering the engine cylinder (such as fresh air and exhaust gas recycled based on EGR) to improve the combustion efficiency in the engine cylinder. EGR is a key component installed on internal combustion locomotives. Its main function is to control and regulate the combustion process of the engine by reintroducing part of the exhaust gas into the intake system.

[0032] Because the recycled exhaust gas contains particulate matter, it will cause particulate matter to adhere to the heater and form carbon deposits. In order to avoid other effects caused by carbon deposits (such as affecting engine intake, etc.), the heater status can be tested so that related problems can be discovered in time.

[0033] When it is determined that heating is required, the vehicle's heater can be driven at a target voltage to perform intake air heating. During this process, the actual current value of the heater can be determined first. The actual current value is used to represent the actual current of the heater when it is working in the current state.

[0034] It should be noted that the present application does not make any limitation on how to determine that the heater needs to perform intake air heating. Figure 2 The schematic diagram of the intake air heating execution logic shown mainly includes five aspects, specifically:

[0035] (1) Battery judgment: The battery pressure (the battery is used to supply energy to the heater) is compared with the minimum voltage value for intake heating release (TI_iHeatAbnormalMax_C), where the minimum voltage value for intake heating release refers to the minimum voltage when the intake heating requirement is met. If the battery pressure is greater than the minimum voltage value for intake heating release, it can be considered that there is no problem with the battery and the intake heating requirement can be met.

[0036] (2) T15 power-on judgment: It is mainly based on the T15 rising edge state judgment to determine whether the vehicle controller is working, so as to control the intake air heating, etc.

[0037] (3) Engine status judgment: judgment of the engine operating status and the engine operation preparation stage. Because the engine has different intake air heating requirements at different stages (such as different heating times), this judgment is helpful to ensure the safety of intake air heating.

[0038] (4) Periodic heating strategy: Based on the comparison between the mileage after the last heating and the periodic heating mileage limit (VehSys_ISumRegularHeat_C), the periodic heating mileage limit refers to the minimum vehicle mileage that should be spaced between two heatings. If the mileage after the last heating is greater than the periodic heating mileage limit, it indicates that the next heating can be performed. Alternatively, based on the comparison between the engine running time after the last heating and the periodic heating running time limit (VehSys_tiEngineRunSumRegularHeat_C), the periodic heating running time limit refers to the minimum engine running time that should be spaced between two heatings. If the engine running time after the last heating is greater than the periodic heating running time limit, it indicates that the next heating can be performed. Usually, only one of the two periodic heating strategies is required, so the judgment results of the two periodic heating strategies are processed using OR logic.

[0039] (5) EGR route status judgment: EGR is used to control the exhaust gas recycling. The main reason for the abnormal heater status is that the particulate matter contained in the recycled exhaust gas will adhere to the heater. Therefore, the EGR route can be judged to ensure that there is no problem with the route.

[0040] Finally, the judgment results of the above five aspects can be combined and processed using AND logic. When the conditions of the above five aspects are met, the driving state of the intake heater can be determined, that is, whether the heater needs to perform intake heating.

[0041] It should also be noted that the present application does not impose any limitation on how to determine the actual value of the current. For ease of understanding, the present application provides the following methods as examples:

[0042] In a possible implementation, during the heating process of the heater, the actual resistance value of the heater and the actual voltage value at both ends of the heater can be obtained, and then the actual current value can be determined based on the actual voltage value and the actual resistance value. Among them, the actual resistance value can be used to represent the actual resistance of the heater in the current state, and the actual voltage value can be used to represent the actual voltage used to drive the heater in the current state, so the actual current value can be determined based on the two. Based on this, it is helpful to determine the accurate actual current value. In addition, in actual applications, the battery will age with use, which may cause a difference between the actual voltage that can be provided to the heater and the set target voltage. In this regard, the above-mentioned method of determining the actual current value based on the actual resistance value and the actual voltage value can be compatible with problems such as battery aging and determine a more accurate actual current value.

[0043] In actual applications, if there is a large gap between the actual voltage value and the target voltage (for example, the actual voltage value is less than the target voltage by more than the voltage threshold), it indicates that the battery is seriously aged. At this time, the user can be reminded to inspect the battery.

[0044] In a specific implementation, when the heater starts to heat, the constant current source module can provide a detection current to the heater, and the voltage detection module can collect the corresponding voltage value when the heater is running at the detection current as the detection voltage, and the actual resistance value is determined according to the detection voltage and the detection current. Then, the heating control module provides a driving current to the heater, and the voltage detection module can collect the corresponding voltage value when the heater is running at the driving current as the actual voltage value.

[0045] Among them, the detection current is smaller than the driving current. Based on this, the resistance measurement is first realized with a smaller current, and then the heating drive is realized with a larger current. In practical applications, the heating control module can use pulse width modulation (PWM) to adjust the heating power and realize precise control of the heating process.

[0046] For better understanding, the present application also provides the following examples: Figure 3 A schematic diagram of a controller hardware circuit is shown, specifically:

[0047] The constant current source module is used to provide a detection current. After providing a constant detection current, the voltage detection module is used to detect the voltage across the heater to determine the actual resistance value of the heater.

[0048] The heating control module is used to provide a driving current to drive the heater to heat the intake air. Specifically, the heating power can be adjusted based on the PWM method.

[0049] The voltage detection module is used to detect the voltage across the heater and calculate the actual resistance value of the heater together with the current provided by the constant current source module. Also, the actual voltage value and the actual current value are calculated together with the heating control module. In addition, for battery aging, detection can also be performed based on the voltage detection module to estimate the degree of battery aging so as to detect battery aging problems in a timely manner.

[0050] The main microcontroller unit (MCU) is used to control various signals in the vehicle (such as the current, resistance, voltage and other signals mentioned above).

[0051] Controller Area Network (CAN) is a serial communication protocol bus for real-time applications. It is widely used in the automotive field. Based on CAN transceivers and CAN buses, it can realize the transmission of various signals (such as the aforementioned current, resistance, voltage and other signals).

[0052] S102: Obtain the current range corresponding to the heater.

[0053] The current interval is used to identify the current value range allowed when the heater in a normal state is driven with a target voltage to perform intake air heating.

[0054] It should be noted that the present application does not impose any limitation on the method for determining the current interval. For ease of understanding, the present application provides the following method as an example:

[0055] In a possible implementation, the current range can be calibrated based on a simulation experiment. In specific implementation, on the one hand, the current value corresponding to the intake air heating when the heater has no attachments can be simulated, for example, a simulation experiment can be performed with a brand new heater. On the other hand, the current corresponding to the intake air heating when the heater has a small amount of carbon deposits can also be simulated. By changing the amount of carbon deposits, simulation experiments are continuously performed to find the maximum allowable amount of carbon deposits and determine the corresponding current value at this time.

[0056] In actual applications, the corresponding resistance value will be different when there are attachments or damage to the heater compared to a new one. Therefore, the resistance value of the heater changes with the state of the heater. The resistance of the heater in an abnormal state exceeds the resistance value range of the heater in a normal state. The resistance value range of the heater in a normal state corresponds to the current range.

[0057] Usually, the heater includes multiple grids. When there are too many attachments or the grids are deformed, resulting in adhesion between the multiple grids, the resistance value of the heater becomes smaller. Therefore, the maximum allowable carbon deposit amount can be determined based on simulation experiments, and the resistance value at this time is determined to be the lower limit of resistance. Also, when the heater is damaged (such as missing grids, etc.), the resistance of the heater will increase. For this, the allowable degree of damage can be determined based on simulation experiments, and the corresponding resistance value can be determined as the upper limit of resistance. Alternatively, a simulation experiment can be performed with a new heater to determine the corresponding resistance value as the upper limit of resistance. Accordingly, under the same voltage drive, the lower limit of resistance will correspond to the upper limit of current indicated by the current interval, and the upper limit of resistance will correspond to the lower limit of current indicated by the current interval.

[0058] S103: If the actual current value exceeds the current range, it is determined that the heater is in an abnormal state.

[0059] Since the current range is used to identify the allowable current value range when the heater in a normal state is driven by the target voltage to perform intake air heating, when the actual current value exceeds the current range, it indicates that the current state is different from the normal state. Specifically, it may be because the current exceeds the allowable current range due to adhesion, damage, etc. of the heater. Therefore, it can be determined that the heater is in an abnormal state for subsequent maintenance, etc.

[0060] It should be noted that this application does not limit how to determine the abnormal state when the actual current value exceeds the current interval. For ease of understanding, the embodiments of this application provide the following methods as examples:

[0061] In order to achieve more accurate detection, in a possible implementation, if the actual current value is greater than the current upper limit value indicated by the current interval, it can be determined that the heater is in a first abnormal state, and the first abnormal state is used to indicate that there is adhesion between multiple grilles of the heater. And if the actual current value is less than the current lower limit value indicated by the current interval, it is determined that the heater is in a second abnormal state, and the second abnormal state is used to indicate that the grille of the heater is damaged.

[0062] In actual applications, the resistance value of the heater changes with the state of the heater. When there is adhesion between the multiple grilles of the heater, the resistance value of the heater becomes smaller, which causes the current value to increase. Therefore, when the actual current value is greater than the upper limit of the current, it can be determined that there is an adhesion problem. Also, when the grille of the heater is damaged, the resistance value of the heater increases, which causes the current value to decrease. Therefore, when the actual current value is less than the lower limit of the current, it can be determined that there is damage. Based on this, different abnormal states are distinguished to achieve more accurate detection, so as to better prompt the user what the current problem is.

[0063] Due to the recycling of exhaust gas, particulate matter carried in the exhaust gas will adhere to the heater, specifically to the surface of the grille, forming carbon deposits. When the amount of carbon deposits is too much, it will cause adhesion between the grilles. Therefore, in one possible implementation, the aforementioned first abnormal state is used to indicate that the amount of carbon deposits attached to the surfaces of multiple grilles of the heater exceeds the carbon deposition threshold, and the amount of carbon deposits exceeding the carbon deposition threshold causes adhesion between multiple grilles. Among them, the carbon deposition threshold can be pre-set to indicate the upper limit of the allowable carbon deposition amount, for example, it can be determined in a simulation experiment. Based on this, it is possible to promptly remind users to clean up carbon deposits, etc.

[0064] In addition, if the actual current value falls within the current interval, it indicates that the current value in the current state is within the allowable current range, so it can be determined that the heater is in a normal state.

[0065] In actual applications, after the state of the heater is detected and determined, a prompt message can be sent to the user immediately, and the prompt message is used to remind the user of the current state of the heater (such as the amount of carbon deposits exceeding the threshold, etc.). For example, the prompt message is displayed on the vehicle display screen, or sent to the user's mobile phone, so that the user can understand the current situation in time and can promptly repair it if there is a problem.

[0066] It can be seen from the above technical solution that in the process of driving the vehicle's heater to perform intake air heating with the target voltage, the actual current value of the heater can be determined first. The heater is used to heat the gas entering the engine cylinder of the vehicle, and the actual current value is used to indicate the actual current of the heater when it is working in the current state. Then, the current interval corresponding to the heater can be obtained, and the current interval is used to identify the current value range allowed when the heater in the normal state is driven by the target voltage to perform intake air heating. Since the current interval is determined under the target voltage drive, and the target voltage is also driven in actual work, if the actual current value exceeds the current interval, it can be indicated that the current state of the heater is different from the normal state. Specifically, it can be because the current exceeds the allowed current range due to adhesion, damage, etc. of the heater, so it can be determined that the heater is in an abnormal state for subsequent maintenance, etc. Based on this, with the help of adhesion, damage, etc. of the heater, the current of the heater will change when it is working, and a method based on comparing the actual current value with the current value range allowed during normal operation is provided to quickly detect the heater state, so that abnormal conditions can be determined in time, which is conducive to improving driving safety, etc.

[0067] For a further understanding, the present application also provides the following examples: Figure 4 A schematic diagram of an abnormal state detection logic of an air intake heater is shown, specifically:

[0068] After determining the actual value of the heater current, the current rationality judgment state is first performed. In this process, the actual current value is compared with the maximum current value ( Figure 4 3 in the figure) and the minimum current ( Figure 4 The current is compared with the actual current value (as shown by the number 4 in the figure) to determine whether the actual current value is reasonable. If the actual current value is within this range, 0 is output, otherwise 1 is output. After that, the output 0 or 1 is inverted using the NOT logic, NOT (0) = 1, NOT (1) = 0, and then processed with other judgment results using AND logic.

[0069] as well as, Figure 4 The heater current upper limit value (TI_iHeatAbnormalMax_C) and the heater current lower limit value (TI_iHeatAbnormalMin_C) shown are used to identify the aforementioned current range. When specifically detecting:

[0070] If the actual current value is greater than the upper limit of the heater current, it can be determined that the heater is in the aforementioned first abnormal state. Then, the result of the aforementioned current rationality judgment is processed using AND logic. If the result of the aforementioned current rationality judgment indicates NOT (0) = 1, then after AND logic processing, it can be determined that the heater diagnostic state is the first abnormal state, which can specifically indicate a heater short circuit adhesion fault (DFC_AirHeaterCircuitBond), for example, it can be caused by the amount of carbon deposits exceeding the carbon deposit threshold.

[0071] If the actual current value is less than the heater current lower limit value, it can be determined that the heater is in the aforementioned second abnormal state. Then, the result of the aforementioned current rationality judgment is processed using AND logic. If the result of the aforementioned current rationality judgment indicates NOT (0) = 1, then after AND logic processing, it can be determined that the heater diagnosis state is the second abnormal state, which can specifically indicate a heater damage and fracture fault (DFC_AirHeaterDestroyed), such as grille defect or fracture caused by excessive heating, collision, violent maintenance, etc.

[0072] It can be understood that it basically corresponds to the method embodiment, so the relevant parts can refer to the partial description of the method embodiment.

[0073] Figure 5 This is a structural diagram of a vehicle heater status detection device provided in an embodiment of the present application, wherein the device includes a determination unit 501 and an acquisition unit 502:

[0074] The determining unit 501 is used to determine the actual current value of the heater in the process of driving the heater of the vehicle to perform intake air heating at the target voltage, wherein the heater is used to heat the gas entering the engine cylinder of the vehicle;

[0075] The acquisition unit 502 is used to acquire a current interval corresponding to the heater, where the current interval is used to identify a current value range allowed when the heater in a normal state is driven by the target voltage to perform intake air heating;

[0076] The determining unit 501 is further configured to determine that the heater is in an abnormal state if the actual current value exceeds the current interval.

[0077] In a possible implementation manner, the determining unit is further configured to:

[0078] If the actual current value is greater than the current upper limit value indicated by the current interval, it is determined that the heater is in a first abnormal state, and the first abnormal state is used to indicate that there is adhesion between the grilles of the heater;

[0079] If the actual current value is less than the lower current limit value indicated by the current interval, it is determined that the heater is in a second abnormal state, and the second abnormal state is used to indicate that the grille of the heater is damaged.

[0080] In a possible implementation, the first abnormal state is used to indicate that the amount of carbon deposits attached to the surface of the grille of the heater exceeds a carbon deposition threshold, and the amount of carbon deposits exceeding the carbon deposition threshold causes adhesion between the grilles.

[0081] In a possible implementation manner, the determining unit is further configured to:

[0082] During the heating process of the heater, obtaining an actual value of the resistance of the heater and obtaining an actual value of the voltage across the heater;

[0083] The actual current value is determined according to the actual voltage value and the actual resistance value.

[0084] In a possible implementation manner, the determining unit is further configured to:

[0085] When the heater starts to heat, a detection current is provided to the heater through a constant current source module, and a voltage value corresponding to the heater when the heater runs at the detection current is collected through a voltage detection module as a detection voltage;

[0086] Determining the actual value of the resistance according to the detection voltage and the detection current;

[0087] A driving current is provided to the heater through a heating control module, and a voltage value corresponding to the heater when running with the driving current is collected through the voltage detection module as the actual voltage value, the detection current is less than the driving current, and the driving current corresponds to the target voltage.

[0088] In one possible implementation, the resistance value of the heater changes with the state of the heater, the resistance of the heater in the abnormal state exceeds the resistance value range of the heater in the normal state, and there is a corresponding relationship between the resistance value range of the heater in the normal state and the current range.

[0089] In a possible implementation manner, the determining unit is further configured to:

[0090] If the actual current value falls within the current interval, it is determined that the heater is in a normal state.

[0091] It can be seen from the above technical solution that in the process of driving the vehicle's heater to perform intake air heating with the target voltage, the actual current value of the heater can be determined first. The heater is used to heat the gas entering the engine cylinder of the vehicle, and the actual current value is used to indicate the actual current of the heater when it is working in the current state. Then, the current interval corresponding to the heater can be obtained, and the current interval is used to identify the current value range allowed when the heater in the normal state is driven by the target voltage to perform intake air heating. Since the current interval is determined under the target voltage drive, and the target voltage is also driven in actual work, if the actual current value exceeds the current interval, it can be indicated that the current state of the heater is different from the normal state. Specifically, it can be because the current exceeds the allowed current range due to adhesion, damage, etc. of the heater, so it can be determined that the heater is in an abnormal state for subsequent maintenance, etc. Based on this, with the help of adhesion, damage, etc. of the heater, the current of the heater will change when it is working, and a method based on comparing the actual current value with the current value range allowed during normal operation is provided to quickly detect the heater state, so that abnormal conditions can be determined in time, which is conducive to improving driving safety, etc.

[0092] In another aspect, an embodiment of the present application provides a computer device, the computer device comprising a processor and a memory:

[0093] The memory is used to store program codes and transmit the program codes to the processor;

[0094] The processor is used to execute the vehicle heater status detection method provided by the above embodiment according to the instructions in the program code.

[0095] The computer device may include a terminal device or a server, and the aforementioned vehicle heater state detection device may be configured in the computer device.

[0096] On the other hand, an embodiment of the present application further provides a storage medium, wherein the storage medium is used to store a computer program, and the computer program is used to execute the vehicle heater status detection method provided in the above embodiment.

[0097] In addition, an embodiment of the present application further provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the vehicle heater status detection method provided in the above embodiment.

[0098] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, the above program can be stored in a computer-readable storage medium, and when the program is executed, it executes the steps of the above method embodiment; and the above storage medium can be at least one of the following media: read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc., various media that can store program codes.

[0099] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0100] It should be noted that, in this article, relational terms such as "first" and "second", etc. (if any) are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0101] The above is a detailed introduction to a vehicle heater status detection method and related devices provided by the embodiment of the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application. At the same time, for those skilled in the art, according to the method of the present application, there will be changes in the specific implementation method and application scope.

[0102] In summary, the content of this specification should not be understood as limiting the present application, and any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in this application should be included in the protection scope of this application. Moreover, based on the implementations provided in the above aspects, this application can also be further combined to provide more implementations.

Claims

1. A method for detecting a heater status of a vehicle, characterized in that: The method comprises: determining an actual value of a current of a heater for heating gas entering an engine cylinder of the vehicle during a process of driving the heater of the vehicle at a target voltage to perform intake air heating; acquiring a current interval corresponding to the heater, the current interval being used to identify a current value range allowed when the heater in a normal state is driven by the target voltage to perform intake air heating; If the actual current value exceeds the current interval, it is determined that the heater is in an abnormal state; The determining the actual current value of the heater comprises: During the heating process of the heater, an actual resistance value of the heater and an actual voltage value across the heater are obtained, wherein the actual resistance value is used to represent the actual resistance of the heater in a current state, and the actual voltage value is used to represent the actual voltage used to drive the heater in a current state; Determining the actual current value according to the actual voltage value and the actual resistance value; And, if the difference between the actual voltage value and the target voltage exceeds a voltage threshold, it is determined that the battery is aged, and the battery is used to provide a voltage for driving the heater.

2. The method according to claim 1, characterized in that If the actual current value exceeds the current interval, determining that the heater is in an abnormal state includes: If the actual current value is greater than the current upper limit value indicated by the current interval, it is determined that the heater is in a first abnormal state, and the first abnormal state is used to indicate that there is adhesion between the grilles of the heater; If the actual current value is less than the lower current limit value indicated by the current interval, it is determined that the heater is in a second abnormal state, and the second abnormal state is used to indicate that the grille of the heater is damaged.

3. The method according to claim 2, characterized in that The first abnormal state is used to indicate that the amount of carbon deposits attached to the surface of the grille of the heater exceeds a carbon deposit threshold, and the carbon deposit amount exceeding the carbon deposit threshold causes adhesion between the grilles.

4. The method according to claim 1, characterized in that The step of obtaining the actual resistance value of the heater and the actual voltage value at both ends of the heater during the heating process of the heater includes: When the heater starts to heat, a detection current is provided to the heater through a constant current source module, and a voltage value corresponding to the heater when the heater runs at the detection current is collected through a voltage detection module as a detection voltage; Determining the actual value of the resistance according to the detection voltage and the detection current; A driving current is provided to the heater through a heating control module, and a voltage value corresponding to the heater when running with the driving current is collected through the voltage detection module as the actual voltage value, the detection current is less than the driving current, and the driving current corresponds to the target voltage.

5. The method according to claim 1, characterized in that The resistance value of the heater changes with the state of the heater, the resistance of the heater in the abnormal state exceeds the resistance value range of the heater in the normal state, and there is a corresponding relationship between the resistance value range of the heater in the normal state and the current interval.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: If the actual current value falls within the current interval, it is determined that the heater is in a normal state.

7. A vehicle heater status detection device, characterized in that: The device comprises a determining unit and an acquiring unit: The determination unit is used to determine an actual value of the current of a heater for heating gas entering an engine cylinder of the vehicle during a process of driving the heater of the vehicle at a target voltage to perform intake air heating, the heater being used to heat gas entering an engine cylinder of the vehicle; The acquisition unit is used to acquire a current interval corresponding to the heater, wherein the current interval is used to identify a current value range allowed when the heater in a normal state is driven by the target voltage to perform intake air heating; The determining unit is further configured to determine that the heater is in an abnormal state if the actual current value exceeds the current interval; The determining unit is further configured to: During the heating process of the heater, an actual resistance value of the heater and an actual voltage value across the heater are obtained, wherein the actual resistance value is used to represent the actual resistance of the heater in a current state, and the actual voltage value is used to represent the actual voltage used to drive the heater in a current state; Determining the actual current value according to the actual voltage value and the actual resistance value; And, if the difference between the actual voltage value and the target voltage exceeds a voltage threshold, it is determined that the battery is aged, and the battery is used to provide a voltage for driving the heater.

8. A computer device, characterized in that: The computer device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the method according to any one of claims 1 to 6 according to the instructions in the program code.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method according to any one of claims 1 to 6.

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